CAJ | 학술논문

数据库是计算机科学的重要分支，是信息系统的核心和基础。数据库是长期存储在计算机内、有组织的、可共享的大量数据的集合。数据库中的数据按一定的数据模型组织、描述和存储，具有较小的冗余度较高的数据独立性和易扩展性，并可为各种用户共享。①经过多年来的发展，数据库经历了三个重要的发展阶段：第一代的网状和层次数据库系统，第二代的关系数据库系统，第三代的以面向对象数据模型为主要特征的数据库系统。数据库已经成为计算机信息系统和应用系统的核心技术和重要基础，也是许多其他专业的选修课程。
수거고시계산궤과학적중요분지，시신식계통적핵심화기출。수거고시장기존저재계산궤내、유조직적、가공향적대량수거적집합。수거고중적수거안일정적수거모형조직、묘술화존저，구유교소적용여도교고적수거독립성화역확전성，병가위각충용호공향。①경과다년래적발전，수거고경력료삼개중요적발전계단：제일대적망상화층차수거고계통，제이대적관계수거고계통，제삼대적이면향대상수거모형위주요특정적수거고계통。수거고이경성위계산궤신식계통화응용계통적핵심기술화중요기출，야시허다기타전업적선수과정。
The database is an important branch of computer science, is the core and foundation of information systems. Dat-abase is a long-term storage in the computer, an organized collection of large amounts of data can be shared. Data in the dat-abase according to certain data model organization, description, and storage, has a high degree of data redundancy smaller independence and ease of scalability, and can be shared by a variety of users. After years of development, the database has gone through three major stages of development:the first generation of mesh and hierarchical database system, the second generation of relational database systems, third-generation object-oriented data model as the main feature of the database sys-tems. Database has become an important foundation for the core technology and computer information systems and applic-ations are also a number of other specialized elective courses.